Cooling-coil for refrigerator-boxes.



w. EHn/IKE.y COOLING COIL FOR REFRIGERATOR BOXES.

APPLICATION FILED MAY3. |917.

L ,2'm L 6%., I Patented July 23, 1918.

WILHELM EHI/IKE, F MILWAUKEE, WISCONSIN.

COOLING-COIL FOR REFRIGERATOE-BOXES.

- maratea.

vspeeuicauum of Letters raten. Patented July 23, lulu.

application med nay a, i917. serial no. 166,261.

To all 'whom 'it may concern.'

Be it known Vthat I, WILHELM VEI-IMKE, a citizen of the lUnited States, and resident of Milwaukee, inthe county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Cooling-Coils yfor Refrigerating-Boxes; and I do hereby declare that the following is a full, clear, and exact description thereof.

. My invention relates to certain new and v useful improvements in refrigerating or cooling boxes in which abrine or service water is employed as the cooling medium.

In a large number of the refrigerating boxes now in general use, the cooling coils are composed of a series of pipes running longitudinally orv transversely in the box which is a very expensive arrangement, and with this inherent objection 'in view, my invention has for its primary object to provide a refrigerating box in which the coil is formed in two sections, each section being stamped from a single sheet of metal and then being secured together as will be-hereinafter described. 1

A further object lof my invention is to provide a refrigerating b ox in which the cooling coil will be composed of two sections, each stamped from a single sheet of metal which, when placed together, will have formed therebetween a serpentine` or tortuous passage for the cooling medium.

With the above and other minor objects 4in view, "which will appear as descri tion proceeds, my invention 'resides in t e novel construction, arrangement, and combination of parts substantially as hereinafter described and more particularly defined by the claim, it being understood that changes in the precise embodiment 'of the invention herein disclosed may be made without departing from the spirit of the invention.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention constructed according-to the best mode I have so far devised for the-practical'application of the principles of my invention; in which,

Figure 1 is a sectional vievT through the refrigerating box, the coils thereof being shown intop planI view, and

Fig. 2 is a sectional view taken on the line 2,-2 of Fig. 1.

My invention resides essentially in the manner of constructing"` the cooling or refrigerating coils which are disposed in the refrigeratlng box 5 including the side and rear walls 6, top and bottom 7, and front hinged door 8 all supported upon legs 9,

the said door, side andv rear walls, and top and bottom having on the inner portion thereof any suitable non-heat conducting material 10 such as mineral wool, cork, or the like. 'This material adjacent the top and bottom is held in position by a false top. and bottom 7', and the door 8 has a false back 8 for'the same purpose. l

My coil forms an inner wall for the refrigerating box casing as it is spaced from the side walls of the, latter although it is in contact with the false top and bottom. Such an arrangement obviously prevents the mineral wool, cork or other finely divided insulating material from escaping and holds it in operative position without the addition of the usual retaining wall. 4It comprises two like sections 11, each of which sections are struck from a single sheet of metal and gether by the rivets or other fastenings 13,

the raised portions 12 of one section aline with those of the other section making a tortuous or serpentine passage way for the cooling means.

As a lsimple means for holding the coil properly spaced from theside walls of the box, I provide the false top and bottom 7 with grooves which extend parallel to and are spaced from said side walls as shown at 20 to receive the upper and lower edges 21 of the sheets formin the coil. This eliminates the necessity Ior inserting fastening elements through the sheets, while at the same time it absolutely prevents the coil lfrom springing away from the walls of the 'Ihe coils, of course, being' provided at one end with the inlet 14 and at the other extreme end with the outlet 15, the Service water or brine, as the case may be, enters at 14 and describes a zi zag route through the passages 16 formed hy the raised portions 12, in the manner as indicated by arrows in Fig. 2.

In most of the inventions of this characing one strong enough to withstand the pressure to which it is subjected when its outlet valve (not shown) is closed and its inlet valve (not shown) is open, which is normally about forty pounds to a square inch. My construction eliminates this danger of the coils bulging or becoming leaky under strain of the pressure by reason of its strength and durability of construction, and further it is of such simple construction as to be wholly desirable and practical.

I claim:

In a refrigerator having the side wall provided with a layer of finely divided non-heat conducting material, composite top and bottom sections fitted thereto, the inner face of said sections each having a groove para-lleling the side Wall and spaced therefromv a distance equal to the thickness ofthe layer of said material, the combination of a metallic lining unit for the refrigerator side wall comprising a sheet formed from' a pair ofA nally disposed channels communicating at their upper and lower ends to form a continuous passage-way, said lining being longitudinally bent at intervals between said channels to conform to the contour of the refrigerator side wall, the top and bottom edges of the plates forming the lining being brought together to constitute seam beads for disposition in said grooves of the top and bottom sections to secure said nonheat conducting material in position and to hold said lining in spaced relation to the side wall.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in

the county of Milwaukee and 'State of Wis- `40 consin.

WILHELM EHMKE. 

